Elmer's name hit the international headlines when he was exposed as the whistle-blower on the activities of his former employer, Swiss bank Julius Bär, in the Cayman Islands, handing over the
names of 2,000 tax evaders to WikiLeaks. The episode was one of a number that focused attention on tax havens. In an exclusive interview, Elmer explains why he did it, what the impact has been on
the world and his life and why he is the one being treated as a criminal.